Symlink corruption on Mac OS X

Mac OS X on my desktop computer (a newish 27" iMac, using a Promise Thunderbolt disk array for the root filesystem) seems to be having filesystem troubles. I notice it through symlinks going awry, though I'm sure they're not the only victim. I tidied all the errant symlinks up two weeks ago, hoping it was a temporary glitch, but they're back again today. Here's an example:

Mac OS X on my desktop computer (a newish 27" iMac, using a Promise Thunderbolt disk array for the root filesystem) seems to be having filesystem troubles. I notice it through symlinks going awry, though I’m sure they’re not the only victim. I tidied all the errant symlinks up two weeks ago, hoping it was a temporary glitch, but they’re back again today. Here’s an example: